Can I convert JSON back to YAML?

See the JSON Pretty JSON to YAML converter for the reverse direction.

Free Online YAML to JSON Converter

Need to feed a YAML config into your code or API? YAML to JSON in one click — paste your YAML, hit Convert and download clean indented JSON. Runs in your browser, nothing uploaded.

What does a YAML to JSON converter do?

YAML is everywhere in DevOps — Kubernetes, Docker Compose, GitHub Actions, Helm charts — but most application code, schema validators and front-end tools speak JSON. A YAML to JSON converter parses the YAML, resolves anchors and aliases, and re-emits the same data in a format every JSON-aware tool can consume natively.

JSON Pretty handles YAML 1.2 and the widely deployed YAML 1.1 dialect, so the typical Kubernetes manifest, CI workflow or Helm values file parses without configuration. Once converted, drop the result into our JSON editor for a tree view with search and copy-by-path. New to JSON? Read the beginner's guide first.

Example

The same data, before and after conversion:

YAML input

name: web
image: nginx:latest
ports:
  - 8080
  - 8443
env:
  NODE_ENV: production

JSON output

{
  "name": "web",
  "image": "nginx:latest",
  "ports": [8080, 8443],
  "env": {
    "NODE_ENV": "production"
  }
}

How to Use

Convert YAML to JSON in three simple steps — no account needed

Paste or upload your YAML

Paste a YAML document, or click "Upload file" to load a .yml or .yaml file from your device.

Click Convert to JSON

Press Convert. The YAML is parsed into a data tree and re-serialized as indented JSON with two-space indentation.

Copy or download the JSON

Copy the JSON to the clipboard, or download a .json file ready for your API, code or schema validator.

Benefits of Converting YAML to JSON format

Why convert YAML to JSON? A few reasons it is usually the right move.

Native for APIs and modern apps: JSON is the default payload format for REST and GraphQL. Once your config is JSON, it drops straight into fetch responses, request bodies and front-end state without an extra parser dependency.
Universal parser support: Every language and runtime ships with a built-in JSON parser. YAML parsing usually means pulling in a third-party library, which adds a transitive dependency and a CVE surface area.
Faster to parse at scale: JSON parsers are simpler and significantly faster than YAML parsers per byte. For configs read on every request, on cold-start or in tight loops, switching to JSON shaves measurable time.
Validatable with JSON Schema: JSON Schema is the standard tool for asserting shape and types. Converting YAML to JSON means you can plug the result into any validator without yet another schema language.
Easier for machines to diff and merge: JSON has fewer ways to spell the same value, so structural diffs are cleaner. CI tools, code review and merge engines all produce more useful output on JSON than on YAML.

Get JSON Pretty in your browser

Format any JSON response and explore it in a clean tree view — right where you open it, no copy-paste.

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Frequently asked questions

It parses your YAML document into an in-memory data tree and re-emits the same data as indented JSON. Scalars, sequences and mappings round-trip cleanly so the output is ready to consume from code, APIs or JSON Schema validators.

JSON is the universal interchange format for APIs, front-end state, NoSQL stores and validation tooling. Many libraries and services accept JSON natively while YAML support is patchy — converting once turns a config file or template into a payload any tool can consume.

They are resolved during parsing — the referenced data is inlined into every alias site, so the JSON output is fully expanded. The result is larger than the original YAML if anchors were used heavily, but it preserves the document semantics exactly.

Block scalars ("|" and ">") are decoded into regular strings with the correct newline handling. The resulting JSON value is a string with the same characters as the YAML source — newlines, indentation and trailing whitespace included where YAML preserves them.

Yes. The parser recognises YAML 1.1-style truthy values and converts them to JSON true/false. If you need them treated as strings, wrap them in quotes in the source YAML ("yes" or "no").

The converter loads the first document and emits its JSON. If your file contains several "---"-separated documents, paste them one at a time, or wrap them in a top-level YAML sequence so the result becomes a JSON array.

Yes. Parsing happens entirely in your browser. Nothing is uploaded, nothing is stored, and the page works offline after the first visit.

Yes. Multi-megabyte documents parse quickly in the browser. Very large files may pause the page briefly while the JSON is rendered into the output area.

The most common culprits are inconsistent indentation, tabs mixed with spaces, missing quotes around values that look like numbers or booleans, and stray ":" inside unquoted strings. The error message points at the line where the parser tripped — fix that location and re-run.

Yes — use the matching JSON to YAML converter for the reverse direction.

The parser accepts YAML 1.2 and the widely deployed YAML 1.1 dialect. In practice, that covers Kubernetes, Docker Compose, GitHub Actions, GitLab CI, Helm and Ansible files without configuration.